Walter White considers himself to be a damn brilliant chemist on Breaking Bad, but does his science hold up under real-life scrutiny? That’s the question posed by the latest episode of Fact or Fictional, the web series hosted by Veronica Belmont.

Guest expert Dr. Jovana J. Grbic, who holds a PhD in chemistry, examines Walt’s fulminated mercury trick, his use of methylamine to cook drugs, and his solution to the dead RV battery (which was not a robot, to Jesse’s eternal disappointment). She even offers some insight into Walt’s personality as a scientist. Watch the video after the jump.

More of Grbic’s work can be found on ScriptPhD, where she covers entertainment from a science-minded perspective. Previous episodes of Fact or Fictional, which have delved into Elysium, Sharknado, Game of Thrones, and more, are on YouTube. For another look at the science of Breaking Bad, take a peek at the Mythbusters special.